Sifting means



Mmhjla, 1929.l 3. pgn-:R

SIFTING MEANS al, LE 'L 1g u 5j 2 Sheets-Sheet 2' fr fi- /l/rlmgl l Filed Dec, 27. 1924 Patented Mar. 19, 1929.

Vunirsi) srfrias,A

, l 1,705,320 ATAENT oFFlc-E'.

JAKOB PETER, OF BADEN, SWITZERLAND. I

Y SIFTING Applicaties mea necmber 27, 1924, seria; No.

This invention relates to sieves generally, for example for use in machines for separating the seeds of weeds-from grain or for vsorting ground material. l

The principal object of the invention is to provide a sieve wherein the mesh openings for the passage of the material to be sifted or sorted are formed by crossed grid parts, one of which is movable relatively to the other in order, not only toeffect the sifting or sorting but also to eiect the automatic cleaning of the mesh ,openings and thus prevent clogging of the latter.

Another important object of the invention is to provide a sifting` means wherein the mesh openings are limited in depth in order that material may be sifted or sorted according to three dimensions, instead of according to two dimensions as heretofore.

. The invention will be described with reference to the accompanying drawings, 1n which: 3

Fig. 1 is a top plan view of one embodiment of the invention;

Fig. 2` is` a vertical section of the sieve shown in Fig. 1 on the line 2f -2 of Fig. 1;

Fig. 3 is a section on the lineB-B of Figs. 1 and 2;

Fig. 4 is an enlarged detail transverse section taken through adjacent intermediate partitions; Fig. 5 is a fragmentary side view looking toward one ot' the intermediate.partitions;

. Fig. 6 is a vertical section on the line 6-6 of Fig. 4;

Fig.y 7 is a plan View of amodified. form of sieve; v

Fig.` 8 is a vertical. section on the linev 8 -8 of Fig.'7; f

f Fig. 9 is a plan view of another modified .term of sieve;

Fig. 10 is a vertical section on the line 10-10 of Fig. 9; Y

Fig. 11 isa plan view el: the lower movable frame of the sieve shown in Figs 9 and F 12 is a vertical section on the line 12-12 of Fig. 11; f

Fig. 13 isa side view of the sieve shown ink Figs. 9 to 12 showing the driving means for the lower frame;

Fig. 14 is a plan View of a further moditied form oi sieve; u Y v Fig. 15 is a vertical section on the line 15-15 of Fig. 14; l v

Fig. 16 is a plan view ofthe lower movends ofthe latter.

'MEANS 758,449, and in switzerland January 1e, 19.24.

in Figs. 1 to 6 of the drawings, a rectangular frame'is formed by side walls 1 andr end walls 2. Said frame 4is divided into separate longitudinally extending spaces or channels a by` partitions 3, and plates 5 having vertical grooves arare secured to the vopposite sides `of said partitions. Imperforatestationary bottoms 6 (Figs. 2 and are arranged inthe longitudinal spaces a adjacent the lower edges of the latter and serve as supports for the material to be sifted. f The width of each of the bottoms 6 is approximately the samev as the distance between opposed plates 5 andbetween the outermost plates 5 land the side walls 1 oftheframe. 4

The grooved plates 5. extend .between vthe bottoms 6 to approximately the lowerv sides of the latter so that the sifted material passinginto the grooves 5a passes through said grooves to a suitable receiving means, such as another bottom or chute (not shown). r Material which is too. coarse to enter the grooves 5, is caused bythe oscillation of the partitions 3 vto pass to the lefthand end of the apparatus (Figs. 1 and 2) and todropthrough apertures 6a between said ends of the bottoms-6 and the adjacent end wall 2 ofthe frame, the bottoms 6 being shorter than the length of theframe. f A vertical series of ygrid wires 9, spaced ay suitable distance apart, liesin fclose proximity to. each ofthe'faees of the plates 5,.as

shown in Figs. 3 and 4, orare partially embedded m 4longitudinalv grooves in said faces, yas shown 1n Fig. 6, and these wires` have their opposite ends secured to the end walls 2 of the Iiframe. These wires 9, togetherwith the grooves 5u of the plates15, form meshes or openings for siftingthe material, and such materialfafter passing between thev wires into the-grooves 5a, drops through the lower y `The depth of the grooves 5a determines one dimension of the particles of material which may passk through the sieve, so that any narrow particles which may vpass between the wires 9 but which are longer than the depth of the grooves 5a are prevented from passingthrough the sieve.

The 1 arrows (Fig: A6) indicate the paths vfollowed by the sifted orso'rted material.

Thus the apparatus, as just described, et

ltects what may be termed the cubic separathe distance between the wires ,9 and the depth bottom 6C.

ot the grooves 5a determine the size of the f particles which grooves 5a.

The partitions 3 and the plates 5 carried thereby are longitudinally movable in slots 3fL in the end walls 2 of the frame, and the partitions are held together' by a transverse crosshead 4- (Figs. 1 and 2). A shaft 10 is 'journalled in the side Walls of the :trame and carries a crank 10a which is connected by a pitman 12 to a crossliead 7 secured to may pass through the the partitions A3. Thus When the shaft 10- revolves the partitions 3 are reciprocated relatively to the wires 9. The shatt 10 may be rotated in any suitable manner. The reciprocation ot the partitions 3 and the plates 5 carried thereby not only eiiiects the sitting ot the material but also prevents clogging of the material between the wires 9.

Figs. Y and 8 show the sitting device just described in a plansitter. A bottom 6c eX- tcnds across the lower end ot the trame and has openings or passages 8b extending therethrough tor the escape ot material from vertical grooves formed in plates 5 secured to the side Walls. In'addition, plates 5b are arranged to reciprocate longitudinally or the The plates 5 Vare caused to reciprocate longitudinally ot the side walls by any suitable means, for example by means ot a crank and pitman such as shown in Fig. 2, and the plates 5'L may be caused to reciprocate longitudinally ot the bottom in the same manner, The Wires 9 (shown in Fig. 8 but omitted from Fig.A 7 for the sake of clearness) have their opposite ends secured'to the end walls ot the trame. n n

The plates 5f', which together with 'the wires 9 serve to sii't the material, preterably move in response to inertia. n

The material which passes between the wires 9 into the' grooves oi theplates `5l on the bottom oi the traine passes out of the 4apparatusl through passages 8"'in the bottom,l and the arrows 1n Fig. 8,1nd1cate the path taken by the material as it passes through the openings 8b and 8C;

According to the embodiment ot the mven tion shown in Figs. 9 to 13, the sitting trame` is 'formed by walls 15 and 1 7. Stationary sieves, comprising sections 16, rigidly connected together, are disposed 1n the srltmg trame and carry wires 16 adjacent the bottom, which' wires run parallel with the end walls 17 of the trame. Beneath the stationary sieves and surrounded by the tram'el, 17 .is a longitudinally movable sifting trame 18, shown in detail in Figs. 11'V andv 12. This frame 18 is provided with longitudinal tongues v19c which Work in :longitudinal grooves formed in the side Walls o the trame 15', 17, so that the frame 18, which is formed ot a plurality of sections 19, is slidable relatively to the frame 15, 17. Each ot the sections 19 ot the trame 18 carries a plurality of spaced Wires 19a which run parallel with the side walls of the trame 15, 17. The wires 19- may be spaced the same distance apart as the wires 16a or otherwise.

A suitable driving means for the trame 18 isl shown in Fig. 13. This may comprise a shaft 102, a crank 103 carried by said sha'lt, and a pitman 12l connecting said crank to a cross-head 7 secured to the frame 18.'

A further form of sieve Iembodying the invention is shown in 14 to 17. This comprises a stationary :trame 2O having Wires 21 extending longitudinally thereof with their opposite ends secured to the ends of the traine and a trame 22 having tongues extending longitudinally ot its side rmembers which slide in grooves extcndinglongitudinally ot the inner sides ot' the sid@ lmembers ot the 'trame 2O in order that the trame 22 may move longitudinally ot' the frame 20. The trame 22 carries transverse cross bars 23 having' in theirupper sides or enges as manv notches 22 as there are wires in theV iframe 20 to receive said wires.

able element wholly in a plane close to `and parallel with that of' the other element.

2. A unitary sieve comprising a v'trame member having parts therein in parallelrelation providing openings therebetween, a grid member having parts in parallel Vrelation providing Aopenings therebetween and arranged relatively close to and across the first parts whereby the openings oi2 the two members vwill coact to provide meshes, the trame' member being reciprocatinglymovable in a path at a right angleto thegrid member and means V'for reciprocating the trame member wholly in a planevclosevto and parallel with that otl the grid member.

l 3. A unitary sieve comprising a trame member having parts therein in parallel'relation providing openings therebetween, Ya

lli',

ifo

grid member having parts in parali'elrelalilo' members being in tongue and grooved relation and one member being reciprocatingly movable in a path at an angle to the other,

and wholly in a plane close to and parallel.

with that of the other member.

4L. A unitary sieve comprising a frame member having parallel wires therein providing openings therebetween, a reciprocatory member slidably mounted within the frame member, said reciprocatoryrmember having parts in parallel relation providing openings therebetween and arranged relatively close to and at aright angle to the wires of said iframe member, whereby the openings of the two members will coact to provide meshes, and means for reciprocating said reciprocatory member wholly in a plane close to and parallel with that of the iframe member.

5. A unitary sieve comprising a Jframe member having parts therein in parallel relation providing openings therebetween, and a grid member' having parts in parallel relation providing openings therebetween and arranged relatively close to and across the parts of said Ytrame member whereby the openings of the two members will coaet to provide meshes, one of the members being movable in a path at a right vangle to the other member and wholly in a plane close to and parallel with that of the other member, the parts of the diiferent members being in interdigitating relation.

6. AV unitary sieve comprising a grid element having parallel openings each of the same width and, another grid element having parallel openings each of the same width, said elements being arranged across each other relatively close together and rclciproeally movable onewith respect to the other wholly in planes Close to and parallel with one another, whereby said openings coact to provide equal sized meshes.

7 A unitary sieve comprising a frame having side and end walls, a plurality of rods extending parallel to the side walls, and mounted in the end walls thereof, a reciprocatory frame mounted in the first frame and provided with a plurality of cross bars having grooves to receive the rods of the first frame with the projecting portions of said cross bars fittingsnugly in the spaces between the rods thus forming open meshes between the rods and cross bars, and means for reciprocating the second vframe wholly in a plane close to and parallel with that of the first rame.

' JAKOB PETER.` 

